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https://issues.apache.org/jira/browse/CASSANDRA-5313?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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C. Scott Andreas updated CASSANDRA-5313:
----------------------------------------
    Component/s: CQL

> provide a cardinality function for collection types ( CQL3 )
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-5313
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5313
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL
>            Reporter: Ahmet AKYOL
>            Priority: Major
>              Labels: cql
>
> Currently , cql3 doesn't provide a cardinality function for collection types. 
> It'll be great to have one:
> {code}
> select content, cardinality(like_set),cardinality(dislike_set) from comments 
> where id=?;
> {code}
> or size as keyword
> {code}
> select content, size(like_set),size(dislike_set) from comments where id=?;
> {code}
> Something similar in SQL is [cardinality of nested 
> tables|http://www.techonthenet.com/oracle/functions/cardinality.php] .



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